1.State Key Laboratory for Geomechanics and Deep Underground Engineering，China University of Mining & Technology(Beijing),Beijing ,China;2.School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing) ,China;3.Beijing Tiandi-Marco Electro-Hydraulic Control System Co.,Ltd.,China Coal Technology and Engineering Group Corporation Ltd.,Beijing ,China；4.Intelligent Control Technology Branch of China Coal Research Institute，Beijing ，China；5.Shaanxi Ruineng Coal Co.,Ltd.,Yanan ,China

Based on the principle of gob-side entry retaining with roof cutting and pressure releasing, the formation mechanism of roadway side wall formed by gangue was analyzed, and the motion characteristics of the roof was discussed by establishing the structure model of surrounding rock. According to the field measured data, the process of the gangue movement was divided into two stages, including rapid collapse stage and slow compaction stage, and then, the interaction relationship between the gangue and the supporting structure at each stage was clearly obtained. Besides, a control ideal, combining static and dynamic in the horizontal direction and extensible at the vertical direction to relief pressure, was put forward to lateral supporting structure base on the motion characteristics of the roof and the gangue. At last, three different control structures were proposed in view of different mining height, and the control system was established, which has been proved to be of good practicality in engineering site.

国家重点研发计划资助项目(2016YFC0600900)；国家自然科学基金资助项目(51674265)；中国博士后科学基金面上资助项目(2017M620955)；中国煤炭科工集团科技创新基金资助项目(2017QN010)；